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Arrhythmia |
Arrhythmias; Atrial Fibrillation; Irregular Heartbeat; Tachycardia |
Atrial fibrillation (AF or afib) is an abnormal heart rhythm (cardiac arrhythmia) which involves the two small, upper heart chambers (the atria). Heart beats in a normal heart begin after electricity generated in the atria by the sinoatrial node spread through the heart and cause contraction of the heart muscle and pumping of blood. In AF, the regular electrical impulses of the sinoatrial node are replaced by disorganized, rapid electrical impulses which result in irregular heart beats. Atr ...
Wikipedia - [full article]
Arrhythmia Articles
- Genes and Disease: Long QT syndrome
... Long QT syndrome (LQTS) results from structural abnormalities in the potassium channels of the heart, which predispose affected persons to an accelerated heart rhythm (arrhythmia). This can lead to su... - Parental Atrial Fibrillation Increases Risk in Offspring, Finds NHLBI's Framingham Heart Study
... Having a parent with atrial fibrillation (AF) strongly increased an offspring's risk of developing this heart rhythm disorder, according to a study of participants in the National Heart, Lung, and... - Postural Tachycardia Syndrome Information Page
... Postural tachycardia syndrome (POTS) is a disorder characterized by a pulse rate that is too fast when the patient stands. Symptoms include rapid heartbeat, lightheadedness with prolonged standing, he... - When Heartbeats Go Haywire:
New Treatments Can Save Lives
... by Margie Patlak Two-time Olympic gold-medalist skater Sergei Grinkov shocked the world in fall 1995, when he collapsed on the ice rink and died hours later at the young age of 28. A blood clot that b...
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